Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:37:55 2012 Optimize a model with 10368 rows, 5256 columns and 36072 nonzeros Presolve removed 1587 rows and 216 columns Presolve time: 0.19s Presolved: 8781 rows, 5040 columns, 32184 nonzeros Variable types: 0 continuous, 5040 integer (5040 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 3.000000e+00, 9214 iterations, 1.46 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 103 45.00000 3.00000 93.3% - 3s H 0 0 4.0000000 3.00000 25.0% - 3s 0 0 3.00000 0 163 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 64 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 123 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 91 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 165 4.00000 3.00000 25.0% - 17s 0 0 3.00000 0 164 4.00000 3.00000 25.0% - 18s 0 2 3.00000 0 119 4.00000 3.00000 25.0% - 21s 4 4 3.00000 1 106 4.00000 3.00000 25.0% 1481 28s 6 6 3.00000 1 90 4.00000 3.00000 25.0% 988 30s 9 8 3.00000 1 78 4.00000 3.00000 25.0% 658 37s 11 9 3.00000 1 76 4.00000 3.00000 25.0% 539 40s 13 10 3.00000 1 80 4.00000 3.00000 25.0% 456 45s 15 12 3.00000 1 94 4.00000 3.00000 25.0% 395 50s 19 14 3.00000 1 91 4.00000 3.00000 25.0% 312 59s 22 16 infeasible 11 4.00000 3.00000 25.0% 10787 60s Cutting planes: Gomory: 1 Zero half: 17 Explored 30 nodes (358338 simplex iterations) in 63.42 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%